Male suicide rates in German prisons and the role of citizenship

Prisoners are at a particularly high risk of suicide. In contrast to other psychosocial risk factors it remains unclear to what degree the risk of suicide differs between prisoners with local citizenship and foreigners. In order to provide more detailed information for suicide prevention in prisons, this study aims to compare suicide rates SR between these populations in German criminal custody.

Methods

Based on a German national database of completed suicide in custody, suicides by prisoners were analysed and compared with epidemiological data of the prison population and the general population, stratified for German and foreign citizenship. Data analysis was adjusted for differences in the age distribution of both populations by calculating standard mortality ratios SMR for suicide.

Results

SR were higher in prisoners with German citizenship than those with foreign citizenship SR = 76.5 vs. SR = 42.8, P<0.01. This association was not specific to the prison population, as the higher SR in citizens compared to non-citizens SR = 19.3 vs. SR = 9.0, P<0.01 were also found in the general population. The association between prison suicide and citizenship was comparable in juvenile and adult prisoners, indicating its relevance to both the juvenile and adult detention systems.

Conclusion

Imprisonment is associated with a substantially increased risk of suicide in both German and non-German citizens, a finding which needs to be taken into consideration by the justice system. The lower suicide risk in non-German citizens is independent of whether or not they are in custody.